In the past I cooked myself into a corner when I realized mid-recipe that I didn't have any lemons or lemon juice available. Nor did I have any limes.

I can't remember the exact recipe, but I believe it was some baked fish dish. What are some possible substitutes for lemon juice in this application? I ended up using a dash of apple cider vinegar. It didn't turn out bad, it just was distinctly not lemon.

That depends; is the lemon there to help balance out the spice in a hot dish, or is it part of a recipe with the word "Lemon" in it?
–
Aaronut♦Jul 15 '10 at 20:07

I don't remember exactly. I'm pretty sure that if it had "Lemon" in the title that I'd be out of luck, so I think it was just there to add some flavor. It was actually a rather sleepy "healthy" dish when I was on a diet.
–
hobodaveJul 15 '10 at 20:09

5

Your story is one of the advantages of 'mise en plas' -- I don't measure out everything, but taking 'em out of the cabinet/fridge at the beginning lets you know if you're missing something. (and when it's still on the counter when you're done, it's a sign you forgot to add something)
–
JoeJul 15 '10 at 21:29

@Joe: Interesting, I've always done that, but didn't realize it had a formal name. I just always found it more convenient.
–
Aaronut♦Jul 15 '10 at 23:30

7 Answers
7

When you find cheap lemons, buy a lot. Squeeze half a lemon in each of the cavities of an ice tray. Freeze. Within a day, remove the frozen slivers from the tray to a ziploc bag in the freezer. You now have measured units of fresh lemon juice you may use for cooking and will keep for months. The frozen lemons are a bit less acid than fresh juice, but full of flavor. You can do the same with limes.

If you're doing it for the acid (i.e. to cut the heat in a spicy dish), you might try cream of tartar if you have it lying around. I've never actually tried to substitute tartar for lemon juice, but lemon juice is the most common substitution for cream of tartar, so it stands to reason that it works both ways. (Note: You would use about 1/3 as much cream of tartar as the amount of lemon juice that's called for).

If it's for general flavouring, this may sound insane, but if you happen to have any cherry brandy or even regular brandy lying around, try that. A solution of sherry and cider vinegar is an OK substitute but doesn't quite have the tartness and strength of lemon juice. While cherry brandy obviously doesn't taste the same as lemon juice, it's often just as good or better in recipes that call for it.

if your using the lemon juice for the acidic aspect then you can use 1/2 as much vinegar. However if it for flavoring I would substitute another juice such as lime or orange. Sometimes you can also you lemon extract for flavoring.

Most of the recipes where you need to add acid, it's about the acid. Either balancing out the salt, or the flavor, or to help chemical reactions. Lemon juice and vinegar are different acids, but if you are from countries where lemons are not the fruit of origin, use what is in your country. Nice apple cider vinegar and use as substitute mentioned above. Vinegar has two forms. Both are present in your bottle of vinegar. One is liquid and one is very volatile and needs to be cooked off (that means using vinegar in cooking you want to cook off the vapors a bit. So in cold dishes, before adding vinegar is good to heat it up for 20 minutes if needed).